Update grafana/loki Docker tag to v2.8.2

This MR contains the following updates:

Package	Type	Update	Change
grafana/loki	ironbank-docker	patch	2.8.1 -> 2.8.2
grafana/loki		patch	2.8.1 -> 2.8.2
grafana/loki	stage	patch	2.8.1 -> 2.8.2

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Release Notes

grafana/loki

v2.8.2

Compare Source

Loki

Security

• 9370 dannykopping: upgrade to go1.20.4

Promtail

Enhancements

• 8994 DylanGuedes: Promtail: Add new decompression configuration to customize the decompressor behavior.

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